Filter Search in LWC Lightning Datatable

public with sharing class DataController {
    
    @AuraEnabled (cacheable=true)
    public static List<Account> retrieveAccounts(){
        return [SELECT Id, Name, Type, BillingCountry, Industry, Email__c
                FROM Account
                LIMIT 2000];
    }
}

<template>
	<lightning-card title="Accounts" icon-name="standard:account">
		<div class="slds-m-around_medium">
			<lightning-layout multiple-rows>
                <lightning-layout-item size="6" padding="around-small"></lightning-layout-item>
				<lightning-layout-item size="6" padding="around-small">
					<lightning-input type="search" label="Search Account" onchange={handleSearch}></lightning-input>
				</lightning-layout-item>
			</lightning-layout>
			<template if:true={data}>
				<lightning-datatable key-field="Id" data={data} columns={columns} hide-checkbox-column="true"
					show-row-number-column="true" onrowaction={handleRowAction}>
				</lightning-datatable>
			</template>
			<template if:true={error}>
				{error}>
			</template>
		</div>
	</lightning-card>
</template>

import { LightningElement, wire, track } from 'lwc';
import retrieveAccounts from '@salesforce/apex/DataController.retrieveAccounts';

const columns = [
    { label: 'Name', fieldName: 'Name' },
    { label: 'Type', fieldName: 'Type' },
    { label: 'Email', fieldName: 'Email__c', type: 'email' },
    { label: 'BillingCountry', fieldName: 'BillingCountry' },
];

export default class LWCFilterSearchDatatable extends LightningElement {
    @track data;
    @track error;
    @track columns = columns;
    @track searchString;
    @track initialRecords;

    @wire(retrieveAccounts)
    wiredAccount({ error, data }) {
        if (data) {
            console.log(data);
            this.data = data;
            this.initialRecords = data;
            this.error = undefined;
        } else if (error) {
            this.error = error;
            this.data = undefined;
        }
    }

    handleSearch(event) {
        const searchKey = event.target.value.toLowerCase();

        if (searchKey) {
            this.data = this.initialRecords;

            if (this.data) {
                let searchRecords = [];

                for (let record of this.data) {
                    let valuesArray = Object.values(record);

                    for (let val of valuesArray) {
                        console.log('val is ' + val);
                        let strVal = String(val);

                        if (strVal) {

                            if (strVal.toLowerCase().includes(searchKey)) {
                                searchRecords.push(record);
                                break;
                            }
                        }
                    }
                }

                console.log('Matched Accounts are ' + JSON.stringify(searchRecords));
                this.data = searchRecords;
            }
        } else {
            this.data = this.initialRecords;
        }
    }
}

<?xml version="1.0"?>
<LightningComponentBundle xmlns="http://soap.sforce.com/2006/04/metadata">
	<apiVersion>54.0</apiVersion>
	<isExposed>true</isExposed>
	<targets>
		<target>lightning__HomePage</target>
	</targets>
</LightningComponentBundle>